(05-31-2014, 12:34 PM)ulao Wrote: When the motor initially turns it could pull 200ma or more but that is just a short bursts. If all controllers start at the same time ( technically impossible ) it could pull too much current. Once they are turning and the initial bust is done they may pull 100ma at max. One usb port at 500ma will take that. If 3 are turning ( 100 * 3 ) and one is starting ( 200 ) you still have enough current but just enough. My guess is that is why Nintendo did that. Since each controller data "poll" is done consecutively there is no way all controllers will turn motors at once. The way I make it work is with an internal hub. There is enough resistance in that hub to allow constant rumble for all 4 controllers. So again, Nintendo would not install a hub, I'm sure... as to why they did that, just to be on the safe side.
Wow, awesome, okay.
Yeah my second guess would have been 'nintendo uses two usb ports just to stay on the safe side'.
Neat. Thanks for breaking that down :)